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Author Topic: Sick idle - what s wrong  (Read 380 times)

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Offline Fulcrum156

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Sick idle - what s wrong
« on: November 25, 2017, 12:48:18 PM »
Hi,
in this link/video you can hear how does idle behave on a chainsaw of mine. In this video I am not touching the gas. I haven't figured out yet if it depends no the quantity of gasoline in the tank. Sometimes really it goes crazy... What could be the cause of this problem?

Note from Admin, photos must be in gallery

Offline johnny newburgh

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Re: Sick idle - what s wrong
« Reply #1 on: November 25, 2017, 06:59:28 PM »
Was not able to look at your link. But as others on chat suggest start with the basics clean air filter,drain fuel tank and put in fresh fuel mix, check spark plug. If that does not help remove carburetor and rebuild. Has any one messed around with adjustment screws? There is a ton of videos on youtube that you can learn a lot from. Also think if it surges it would be associated with an air leak?

Offline sawguy21

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Re: Sick idle - what s wrong
« Reply #2 on: November 25, 2017, 07:38:37 PM »
What johnny said. Carefully check your impuls and fuel lines.
old age and treachery will always overcome youth and enthusiasm

Offline Fulcrum156

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Re: Sick idle - what s wrong
« Reply #3 on: November 26, 2017, 03:54:14 AM »
Where can I upload a movie??? I mean, the gallery doesnt accept that file format.

Offline Ianab

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Re: Sick idle - what s wrong
« Reply #4 on: November 26, 2017, 04:41:01 AM »
Where can I upload a movie??? I mean, the gallery doesnt accept that file format.

Upload to youtube and post a link is the recommended method.  Images need to be on the FF servers, but video files are too big, the that can be hosted on another site.
Weekend warrior, Peterson JP test pilot, Dolmar 7900 and Stihl MS310 saws and  the usual collection of power tools :)

Offline Mountain_d

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Re: Sick idle - what s wrong
« Reply #5 on: November 26, 2017, 06:46:44 AM »
I did not watch the video but if I have an erratic idle I check the following in order of priority; good fresh gas, loose carb mounts / gasket, replace fuel line, replace crank seals (clutch side first as it is easier then retest before doing magneto side). Mountain. 
1978 TJ 230E 3.9L Cummins 4B, Husky 372XP, Husky 61, Husky 266XP, JRed 625, Husky 265RX clearing saw,  Woodmizer LT40HD 1995, Kubota 4950DT (53hp 4WD), Wallenstein V90 Skidding Winch, John Deere 610 backhoe, 1995 Volvo White GMC WCA42T SA Dump Truck, 2004 Ford F-250SD 4WD, , Central Boiler OW


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